GHQ Infantry
GHQ's modern US heavy weapons and infantry are excellent, far better
than every other manufacturers. They are a bit large in scale,
but it allows sufficient detail in the models and makes them paintable.

Infantry and Command

Forward Observer and Stinger

SAW Team

Custom Built Units
I needed 81mm Mortar and M2HB units, so I decided to build them from
GHQ modern US heavy weapons teams. The HMG team came out great,
and uses the CinC M2HB. However, the mortar, made with a length
of plastic, was not a success. Still, they'll suffice.

GHQ Vietnam-Era Infantry
I'm using these models to represent US Army National Guard infantry
The two Vietnam-era infantry packs are are in some ways better than
their modern US counter parts -- there is a wider variety of poses in
the infantry packs, and a good selection of weapons in the heavy
weapons pack -- 81mm & 107mm mortars, 90mm RR gunners, M60 gunners,
infantry with shotguns (might be 40mm grenade launchers?), mortar crew,
commanders, radio men, etc. More to follow.

US National Guard ROAD Infantry Battalion
Common organization in 1960s-1970s for regular army, survived in some
National Guard units into the late 1980s.
3 Infantry companies, each with 3 platoons and a weapons stand in
front, along with a command stand and a FO stand. In back are a
pair of AT vehicles (in this case, Jeeps w/106mm recoilless rifles).
Also, a Redeye stands, a heavy weapons stand, and a 4.2" mortar
stand.